Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (5): 1278-1288.doi: 10.13278/j.cnki.jjuese.201505102

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Fracture Characterization and Prediction of Permian Volcanic Reservoir in Northwestern Margin of Junggar Basin: A Case from Jiamuhe Formation of Jinlong 2 Oil Field

He Hui1, Kong Chuixian2, Jiang Qingping2, Deng Xili1, Xiao Fangwei2, Li Shunming1   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. Xinjiang Oilfield Company Research Institute of Exploration and Development, Karamay 834000, Xinjiang, China
  • Received:2014-11-20 Published:2015-09-26

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Abstract:

The fractures of Jiamuhe Formation of Permian volcanic reservoir are the main flowing channels for the reservoir in Jinlong 2 oil field. Through core observation, thin slice identification, and image logging data, the fracture types are identified: Unfilled or half-filled high-angle fractures are mainly develop in the reservoir, followed by half-filled low-angle oblique and netted fractures. The main orientations of fractures interpreted by image logging data are nearly E-W, and parallel with the current maximum principal stress direction. The fracture development in the volcanic reservoir is mainly affected by two factors: the tectonic position and rock type. The closer it is to the fault;the bigger the structure curvature is, and the greater the fractures are developed. They distributed zonally along the fault. The types of volcanic rocks impact the degree of fracture development. Through the image logging data analysis, the fractures mainly developed in the intermediate-acid volcanic lava and pyroclastic lava. The fracture density, fracture dip, and fracture porosity of single well can be quantitatively calculated. Combining with the method of amplitude versus azimuth (AVAZ) in pre-stack fracture detection technology, the fracture distribution in volcanic reservoir of Jiamuhe Formation can be predicted effectively and accurately. This study provides a reliable basis for a deployment of development well in a volcanic reservoir.

Key words: Permian, volcanic reservoir, fracture, imaging logging, prestack seismic prediction, Junggar basin

CLC Number: 

  • TE122.23

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